Centrifugal, turbine, and similar pump.



PATENTED MAY 15, 1906..'

F. RAY. CENTRIFUGAL,TURBINE,AND SIMLAR PUMP..

APPLIOATION I'ILBD MAY 6, 1905.

Vin

\ lnection with a single-iinpellerturbine-pump l -isTiTED -s'rnpnsiggr "FREDERICK RAY, F EAST ORANGE, NEW JERSEY, ASSIGNOR T@ HENRY WORTHINGTON, OF NEW YORK, N. Y., A. CGRBOBATUN 0F NEW JERSEY.

, CENTRIFUGAL, TURBENES iilD SiNiiLFl ljiilif.

Specication of' Letters atent.

Patented may 15, 1966.

Application filed May 6, 190.5. Serial Ne. 259,250.

" To all whom t may concern:

Be it known that I, FREDERICK RAY, a citizen ofthe UnitedStates, residing at East =Orange,' county of Essex, and State of New cure a more even suction-iiow of liquid to the impeller of a centrifugal or turbine pump and, further, to avoid suction-spaces in which air may collect and interfere withrthe-.pump-suction.

I secure the result desired-'byeI double volute suction-passage, the volantes being formed on opposite sides of andl transversely lto the suction-opening of the impeller and prefer-v ably with lthe volutes meeting centrally of and above the suction-opening.

Inthe accompanying drawings, forming a part of this specification, the invention is shown as applied in its preferred form in conof afwell-known construction, and this con- I is a central section longitudinal shaft. Fig. 3 is a vertical section on the line struction will now be described in detail and 'the features forming the invention then par A l ticularly pointed out in the claims.'

In the drawings, Figure 1 is a side elevation of the suction end of the pump. Fig. 2

y of the pump- 3 of-Fig. 2; Fig. 4 is a horizontal section on the line 4 of Fig.

Referring to said drawings, A is the' umpcasing; B, the suction-head; C, the de 'veryg D, `the impeller carried by the shaft E, and F the diHusin'g-ring. It will be understood, however, that the invention is applicable to pumps of other construction than that shown. Referring now to the features forming the invention, the suctionhead B has a suctionassage 10 entering the'suction-head from Below and-expanding on each side into two volute-passages 11 12, which volutes meet on the line 1 above the impeller-suction 13.

A These volutes 11 12 are preferably formed with their inner walls 2 curved inwardly to-v Ward the impellersuction, which act to dl- 4uid to the impeller.

rect` the liquid to the impeller-suction i3 and aid materially in securing an even iiow of li It'will be understood however, that the volutes may be used 'without this feature of curved guidingsurfaces on the inner1 walls ofthe volutes. As shown, a

stay-web le is used in the suction-passage;

but this is notl essential to the'invention and may be omitted. It is'found in practice that this volute suction secures a very even and properly-distributed flow of li uid to the impeller and that the collection oi air above the impellersuction is thus avoided in pumps in which the suction is taken from below, as shown. The invention is also applicable,

however, to pumps in which the suction is l taken from'above or horizontally,

What I claiinis 1. In a centrifugal, turbine or similar pump, the combination with the impeller and .its suction-opening, of a suction-passage formed in two volutes on opposite sides of and transverse to the impeller suctiomopen ing.

2'. In a centrifugal, turbine or similar pump, the combination with the impeller and its suction-opening, of a suction-passage formed in two volutes on opposite sides of and transverse to the impeller .snctionbpening the inner walls of said volutes being formed with surfaces curving from the outer walls of the volutes to the impeller-suction.

3. A centrifugal, turbine or similar pump having the suctiondiead B provided with the suction-volutes 11, 12 on opposite sides of and meeting above the impeller suction-openg4. A centrifugal, turbine or sinnlar pump having the suction-head B provided with the suction-volutes 11, 12 having the lcurved guiding-surfaces 2 on their inner walls said volutes being formed on opposite sides of and meeting above the impeller suct1onopening. In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

' FREDERICK RAY.

lVitnesses C. J.' SAwYER, J. A. GRAVES, 

